Is Climate a hero or culprit?

Why should those of us in favor of addressing climate change - climate hawks, environmentalists, scientists, 80% of the public - be responsible for convincing others that the world needs saving? Pragmatically speaking, it's no surprise advocates of massive, worldchanging action should be eager to want to explain their reasoning, the burden of proof for addressing climate change should be on the deniers. Do you agree? Why or why not?

Who’s Most Responsible for Climate Change? BY WILLIAM LYNN December 8, 2015 Ethics is a particularly relevant if underreported topic of conversation at the United Nations conference on climate change in Paris. While technical disputes grab the lion’s share of attention, we should not forget the moral reasons we must address global warming—because of the substantial harm it does and will do to the human and nonhuman world. MOST POPULAR Amazon Is Thriving Thanks to Taxpayer Dollars Mormonism’s Crisis of Faith Trump’s Global Bigotry Trump’s Alarming Definition of Treason Welcome to Hell Climate justice refers to the disproportional impact of climate change on poor and marginalized populations, while climate equity refers to who should bear the burden of responsibility for addressing climate change. These twin concerns have both intranational and international dimensions. Climate change will negatively and disproportionately impact poor and marginalized people within national borders as well as cause conflicts between nations, regions and cities that are more or less vulnerable to climate disruptions.

Here’s a list of cause and effect relationships, showing that most climate change impacts will confer few or no benefits, but may do great harm at considerable cost. Agriculture While CO2 is essential for plant growth, all agriculture depends also on steady water supplies, and climate change is likely to disrupt those supplies through floods and droughts. It has been suggested that higher latitudes – Siberia, for example – may become productive due to global warming, but the soil in Arctic and bordering territories is very poor, and the amount of sunlight reaching the ground in summer will not change because it is governed by the tilt of the earth. Agriculture can also be disrupted by wildfires and changes in seasonal periodicity, which is already taking place, and changes to grasslands and water supplies could impact grazing and welfare of domestic livestock. Increased warming may also have a greater effect on countries whose climate is already near or at a temperature limit over which yields reduce or crops fail – in the tropics or sub-Sahara, for example. Health Warmer winters would mean fewer deaths, particularly among vulnerable groups like the aged. However, the same groups are also vulnerable to additional heat, and deaths attributable to heatwaves are expected to be approximately five times as great as winter deaths prevented. It is widely believed that warmer climes will encourage migration of disease-bearing insects like mosquitoes and malaria is already appearing in places it hasn’t been seen before. Polar Melting While the opening of a year-round ice free Arctic passage between the Atlantic and Pacific oceans would confer some commercial benefits, these are considerably outweighed by the negatives. Detrimental effects include loss of polar bear habitat and increased mobile ice hazards to shipping. The loss of ice albedo (the reflection of heat), causing the ocean to absorb more heat, is also a positive feedback; the warming waters increase glacier and Greenland ice cap melt, as well as raising the temperature of Arctic tundra, which then releases methane, a very potent greenhouse gas (methane is also released from the sea-bed, where it is trapped in ice-crystals called clathrates). Melting of the Antarctic ice shelves is predicted to add further to sea-level rise with no benefits accruing. Ocean Acidification A cause for considerable concern, there appear to be no benefits to the change in pH of the oceans. This process is caused by additional CO2 being absorbed in the water, and may have severe destabilising effects on the entire oceanic food-chain. Melting Glaciers The effects of glaciers melting are largely detrimental, the principle impact being that many millions of people (one-sixth of the world’s population) depend on fresh water supplied each year by natural spring melt and regrowth cycles and those water supplies – drinking water, agriculture – may fail. Sea Level Rise Many parts of the world are low-lying and will be severely affected by modest sea rises. Rice paddies are being inundated with salt water, which destroys the crops. Seawater is contaminating rivers as it mixes with fresh water further upstream, and aquifers are becoming polluted. Given that the IPCC did not include melt-water from the Greenland and Antarctic ice-caps due to uncertainties at that time, estimates of sea-level rise are feared to considerably underestimate the scale of the problem. There are no proposed benefits to sea-level rise. Environmental Positive effects of climate change may include greener rainforests and enhanced plant growth in the Amazon, increased vegitation in northern latitudes and possible increases in plankton biomass in some parts of the ocean. Negative responses may include further growth of oxygen poor ocean zones, contamination or exhaustion of fresh water, increased incidence of natural fires, extensive vegetation die-off due to droughts, increased risk of coral extinction, decline in global photoplankton, changes in migration patterns of birds and animals, changes in seasonal periodicity, disruption to food chains and species loss. Economic The economic impacts of climate change may be catastrophic, while there have been very few benefits projected at all. The Stern report made clear the overall pattern of economic distress, and while the specific numbers may be contested, the costs of climate change were far in excess of the costs of preventing it. Certain scenarios projected in the IPCC AR4 report would witness massive migration as low-lying countries were flooded. Disruptions to global trade, transport, energy supplies and labour markets, banking and finance, investment and insurance, would all wreak havoc on the stability of both developed and developing nations. Markets would endure increased volatility and institutional investors such as pension funds and insurance companies would experience considerable difficulty. Developing countries, some of which are already embroiled in military conflict, may be drawn into larger and more protracted disputes over water, energy supplies or food, all of which may disrupt economic growth at a time when developing countries are beset by more egregious manifestations of climate change. It is widely accepted that the detrimental effects of climate change will be visited largely on the countries least equipped to adapt, socially or economically. Resourees: https://www.treehugger.com/climate-change/Climate-change-burden-of-proof.html Chris Tackett Chris Tackett (@ChrisTackett) Science / Climate Change February 14, 2013 Share on Facebook https://newrepublic.com/article/125279/whos-responsible-climate-change Basic rebuttal written by GPWayne https://www.skepticalscience.com/global-warming-positives-negatives.htm