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Despite robust global economic growth over the past two years, worldwide carbon emissions from fossil fuels grew very little in 2014, and might even fall this year. A report released today by the Global Carbon Project has found that fossil fuel emissions of carbon dioxide grew by only 0.6% in 2014, breaking with the fast emissions growth of 2-3% per year since early 2000s. Even more unexpectedly, emissions are projected to decline slightly in 2015 with continuation of global economic growth above 3% in Gross Domestic Product.
For almost all of our species’ 200,000-year history, man’s relationship with the Earth was no different to that of any other animal. All their energy was provided directly by the sun. Sunlight captured by plants using photosynthesis was converted into food and fuel. They ate roots, fruits and grains (and animals that also ate roots, fruits and grains) to provide their bodies with energy. They burned wood to keep themselves warm and fat to provide light at night.
The International Solar Alliance announced by India at the Paris climate conference invites together 120 countries to support the expansion of solar technologies in the developing world. The cost of solar cells has decreased spectacularly over the past four decades, and the trend seems likely to continue. Solar energy has moved from a niche market for providing power in remote places (at the very beginning in 1958 to space satellites) to a mainstream technology which feeds into the national grid.
Coal powered much of the industrial revolution and continues to fuel economic growth in developing nations, including China and India. The dark side of coal, however, is that it generates large quantities of the heat-trapping greenhouse gases, mostly carbon dioxide (CO2), that lead to climate change. This CO2 pollution is in addition to other emissions from coal burning that lead to thousands of premature deaths per day around the world.
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