Climate change is rapidly accelerating. Data show 16 of the world’s 17 hottest years have occurred since 2000. Carbon dioxide concentrations have accelerated to the highest levels in human history. There is no natural explanation for this. Scientists and models may have been too conservative in the past. The frequency and intensity of extreme weather events, heat waves, droughts, flooding and wildfires are all accelerating. So are health effects from climate change, such as heat stress, air pollution and infectious diseases. Oceans are warming about 13 percent faster than previously thought and the destruction of coral reefs is happening at a rate that scientists didn’t expect for another 30 years.
The Arctic is warming at two to four times the rate as the rest of the planet. Sea ice is melting from above and below and is very shallow. Greenland ice sheets are also quickly melting and are increasing global sea levels. As the Arctic warms and loses its ice, it absorbs more solar radiation and warming accelerates. This produces more water vapor, a greenhouse gas. In addition, the Arctic permafrost melts and some of the abundant greenhouse gases (GHG) of methane and carbon dioxide from organic materials in the frozen soil are released into the atmosphere. In time, humanity’s release of GHG may be small in comparison to the natural release mechanisms of the GHG from the ocean, wetlands, soils, and permafrost of the Arctic. But this tipping point has not been reached yet.
Many Americans seem to lack a sense of urgency in dealing with climate change. A few years ago, mankind used chlorofluorocarbons as refrigerants and in aerosol dispensers and these chemicals reacted with ozone to create a hole in the ozone layer of the atmosphere. The ozone layer absorbs harmful solar ultraviolet radiation. Thankfully, the countries respected scientific findings and agreed to stop using the damaging chemicals. Now, ozone is filling in the opening and the ozone crisis has ended.
Fortunately, renewable energy can now compete economically with fossil fuel energy, especially if energy subsidies were removed. The International Monetary Fund (IMF) estimates that global energy subsidies, including the social and environmental costs associated with heavily subsidized fossil fuels, are costing the world’s governments upward of $5 trillion annually. This figure includes over $700 billion in subsidies to U.S. fossil fuel companies. This is equivalent to every American giving fossil fuel corporations $2,180 annually in the form of taxes. This is absurd and shocking. The IMF said that ending subsidies for fossil fuels would cut global carbon emissions by 20 percent.
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Let’s end energy subsidies. Let’s reverse carbon and methane emissions. Let’s support the Paris Agreement and make climate change a high priority for us and for our elected officials. Please join the People’s Climate March in Idaho on Saturday, April 29.
Paul Dawson is an emeritus professor of engineering at Boise State University, specializing in the thermal sciences, atmospheric science and renewable energy.
The People’s Climate March in Idaho, hosted by Idaho Sierra Club, will be at noon Saturday, April 29, at the Idaho Capitol in Boise. Call (208) 384-1023 for details.