scholarly journals What Can We Do to Address Climate Change?

2021 ◽  
Vol 9 ◽  
Author(s):  
Paloma Trascasa-Castro ◽  
Christopher J. Smith

Climate change is one of the most serious problems that humans face today, but until now progress in stopping it has been slow. Climate simulations show that Earth will only stop warming when we reach “net zero” emissions. This means that carbon dioxide (CO2) emissions are cancelled out by an equal amount of greenhouse gas removal from the atmosphere. Worldwide efforts to achieve net zero emissions by 2050 are necessary to avoid some of the worst effects of climate change. Achieving net zero will require huge changes to our society. While there are some things we can all do to fight climate change, the biggest changes need to come from the way our businesses and countries are run, where we get our energy from, how we travel, and how much “stuff” we consume and waste. By taking urgent action, we can ensure the future well-being of billions of people worldwide.

Author(s):  
Jeremy T. Kerr ◽  
Heather M. Kharouba

It is increasingly recognized that, as a result of ever-growing atmospheric inputs of greenhouse gases like carbon dioxide from the burning of fossil fuels, the climate is changing regionally and globally. This has been affirmed, in light of increasing scientific understanding, in the latest report of the Intergovernmental Panel on Climate Change (IPCC) in 2001, by the US National Academy of Sciences in its 2001 report, and most recently by a statement from the Science Academies of all G8 countries, along with China, India, and Brazil. This latter statement calls on the G8 nations to ‘Identify cost-effective steps that can be taken now to contribute to substantial and longterm reduction in net global greenhouse gas emission [and to] recognize that delayed action will increase the risk of adverse environmental effects and will likely incur a greater cost’. Global warming caused by elevated greenhouse gas levels is expressed with long time lags, which can be difficult to appreciate by those unfamiliar with physical systems. Once in the atmosphere, the characteristic residence time of a carbon dioxide molecule is a century. And the time taken for the ocean’s expansion to come to equilibrium with a given level of greenhouse warming is several centuries. If current trends continue, by around 2050 atmospheric carbon dioxide levels will have reached more than 500 parts per million, which is nearly double pre-industrial levels. The last time our planet experienced levels this high was some 20–40 million years ago, when sea levels were around 100m higher than today. It can also be difficult to relate intuitively to the seriousness of the roughly 0.7 °C average warming of the Earth’s surface over the past century. And the warning by the IPCC in its 2001 report, that global warming would be in the range of 1.4–5.8 °C by the end of this century, may also seem unalarming when we experience such temperature swings from one day to the next. There is, however, a huge difference between daily fluctuations, and global averages sustained year on year; the difference in average global temperature between today and the last ice age is only around 5 °C.


2021 ◽  
Vol 3 ◽  
Author(s):  
Peter Healey ◽  
Robert Scholes ◽  
Penehuro Lefale ◽  
Pius Yanda

Climate change embeds inequities and risks reinforcing these in policies for climate change remediation. In particular, with policies designed to achieve “net zero” carbon dioxide, offsets may be considered inequitable if seen to avoid or delay gross emission reductions; offsets to emissions through technologically mature methods of carbon dioxide removals (CDR) require natural resources at scales threatening food security; knowledge of the potential of immature CDR is largely a global north monopoly; and CDR in particular environments is ill-understood and its implications for development unexamined. The use of CDR to contribute to robust progress toward Paris climate goals requires global agreement on simultaneously reducing emissions and enhancing removals, equity in burden sharing, and an interdisciplinary effort led by individual jurisdictions and focused on the co-development of technologies and governance to create CDR portfolios matched to local needs.


2017 ◽  
Vol 48 (2) ◽  
pp. 168-191
Author(s):  
Rebecca Livernois

Climate change has made pressing the question of why we do little to reduce greenhouse gas emissions. By analogy to the puzzle of the self-torturer, I argue that even if interpersonal and intergenerational conflicts of interest were resolved, we may still end up in a regretful environmental state when we aim to maximize our net benefit derived from polluting activities. This is because a rational agent with transitive preferences making climate change decisions faces incentives to over-pollute. This is caused by the presence of marginal costs that are uninformative of well-being in an uncertain and intertemporal decision problem.


1999 ◽  
Vol 26 (3) ◽  
pp. 166-168 ◽  
Author(s):  
TIM NEWCOMB

Many nations have recognized the need to reduce the emissions of greenhouse gases (GHGs). The scientific assessments of climate change of the Intergovernmental Panel on Climate Change (IPCC) support the need to reduce GHG emissions. The 1997 Kyoto Protocol to the 1992 Convention on Climate Change (UNTS 30822) has now been signed by more than 65 countries, although that Protocol has not yet entered into force. Some 14 of the industrialized countries listed in the Protocol face reductions in carbon dioxide emissions of more than 10% compared to projected 1997 carbon dioxide emissions (Najam & Page 1998).


2021 ◽  
Vol 3 ◽  
Author(s):  
Carolina Luchetta ◽  
Erica C. Oliveira Munsignatti ◽  
Heloise O. Pastore

CO2 is the most important greenhouse gas involved in climate change; it has been a concern for many years and will remain as such in the years to come. CO2 adsorption and CO2 utilization have been studied as methods to mitigate the concentration of the gas in the atmosphere by sequestering and transforming it into a value-added product, capable of being commercialized. With those aims in mind, CO2 reduction into 3D graphene was studied using a Zn–Mg mixture. The results show that Mg is the only reducing agent, and Zn acted as a porogen during graphene formation as the energy released by the reaction between CO2 and Mg is enough to evaporate Zn. Thus, Zn vapor increases graphene porosity and increases the contact of CO2 with Mg, yielding larger masses of graphene. A relationship between the Zn–Mg ratio and the reaction yield was found.


2021 ◽  
Vol 3 ◽  
Author(s):  
Stephen Hall ◽  
Mark Davis

The grand scale of GGR deployment now necessary to avoid dangerous climate change warrants the use of grand interpretive theories of how the global economy operates. We argue that critical social science should be able to name the global economy as “capitalism”; and instead of speaking about “transforming the global economy” as a necessary precondition for limiting climate change, instead speak about transforming, or even transcending, capitalism. We propose three principles are helpful for critical social science researchers willing to name and analyse the structural features of capitalism and their relation to greenhouse gas removal technology, policy, and governance. These principles are: (1) Greenhouse Gas Removal technologies are likely to emerge within capitalism, which is crisis prone, growth dependent, market expanding, We use a broad Marxist corpus to justify this principle. (2) There are different varieties of capitalism and this will affect the feasibility of different GGR policies and supports in different nations. We draw on varieties of capitalism and comparative political economy literature to justify this principle. (3) Capitalism is more than an economic system, it is ideologically and culturally maintained. Globally-significant issues such as fundamentalism, institutional mistrust, precarity, and populism, cannot be divorced from our thinking about globally significant deployment of greenhouse gas removal technologies. We use a broad Critical Theory body of work to explore the ideational project of maintaining capitalism and its relation to GGR governance and policy.


2020 ◽  
Vol 2 ◽  
Author(s):  
Astley Hastings ◽  
Pete Smith

The challenge facing society in the 21st century is to improve the quality of life for all citizens in an egalitarian way, providing sufficient food, shelter, energy, and other resources for a healthy meaningful life, while at the same time decarbonizing anthropogenic activity to provide a safe global climate, limiting temperature rise to well-below 2°C with the aim of limiting the temperature increase to no more than 1.5°C. To do this, the world must achieve net zero greenhouse gas (GHG) emissions by 2050. Currently spreading wealth and health across the globe is dependent on growing the GDP of all countries, driven by the use of energy, which until recently has mostly been derived from fossil fuel. Recently, some countries have decoupled their GDP growth and greenhouse gas emissions through a rapid increase in low carbon energy generation. Considering the current level of energy consumption and projected implementation rates of low carbon energy production, a considerable quantity of fossil fuels is projected to be used to fill the gap, and to avoid emissions of GHG and close the gap between the 1.5°C carbon budget and projected emissions, carbon capture and storage (CCS) on an industrial scale will be required. In addition, the IPCC estimate that large-scale GHG removal from the atmosphere is required to limit warming to below 2°C using technologies such as Bioenergy CCS and direct carbon capture with CCS to achieve climate safety. In this paper, we estimate the amount of carbon dioxide that will have to be captured and stored, the storage volume, technology, and infrastructure required to achieve the energy consumption projections with net zero GHG emissions by 2050. We conclude that the oil and gas production industry alone has the geological and engineering expertise and global reach to find the geological storage structures and build the facilities, pipelines, and wells required. Here, we consider why and how oil and gas companies will need to morph from hydrocarbon production enterprises into net zero emission energy and carbon dioxide storage enterprises, decommission facilities only after CCS, and thus be economically sustainable businesses in the long term, by diversifying in and developing this new industry.


2021 ◽  
pp. 159-178
Author(s):  
Christopher Dye

Climate change is prevention’s biggest challenge—its effects on health and well-being will be wide-ranging, long-term, and global. The pressures and opportunities for action are growing as the risks and hazards become clearer, greater, and nearer. Mitigation—cutting greenhouse gas (GHG) emissions (primary prevention)—benefits health, economy, environment, and society through agriculture, transport, air quality, energy supply, and waste management. Adaptation (secondary prevention) is the essential back-up when mitigation fails; there are strong incentives for local adaptation to counter predictable local threats such as extreme urban temperatures, flooding, and water scarcity. Carbon taxes are a powerful but underexploited mechanism for reducing greenhouse gas emissions, so need to be reinforced by other incentives, including subsidies for wind, solar, hydrogen, and hydropower. Now more than ever, the pressure for transformative action on climate change has the potential to stimulate sudden and rapid movement towards clean energy sources and technologies.


2020 ◽  
Vol 10 (1) ◽  
pp. 339 ◽  
Author(s):  
Miguel Ángel Sanjuán ◽  
Carmen Andrade ◽  
Pedro Mora ◽  
Aniceto Zaragoza

The European parliament has declared a global “climate and environmental emergency” on 28 November 2019. Given that, climate change is a clear strategic issue all around the world. Then, greenhouse gas emissions are reported by each country to the United Nations Framework Convention on Climate Change (UNFCCC) every year. In addition, The Intergovernmental Panel on Climate Change (IPCC) in the “2006 IPCC Guidelines for National Greenhouse Gas Inventories” give the procedure to calculate and manage the national greenhouse gases (GHG) emissions. However, these guidelines do not provide any method to consider the net carbon dioxide emissions to the atmosphere (released in clinker fabrication minus those due to concrete carbonation) by the Portland cement clinker industry. This topic should be implemented in the climatic models of the next IPCC assessment report. This paper provides an easy procedure of estimating net CO2 emissions proposed in the “recarbonation project” (simplified method); that is to say, carbon dioxide uptake during the service-life stage is considered as the 20% of the CO2 released by the calcination (process emissions), whereas the end-of-life and secondary usage is only the 3% of the CO2 released by calcination. The outcome of this study reveals that 31,290.753 tons of carbon dioxide will be absorbed by the cement-based materials produced in Spain with the cements manufactured from 2005 to 2015.


Sign in / Sign up

Export Citation Format

Share Document