Biodiversity Hotspots Around The World

From reptiles, the conservation status of the world's snakes

From The Guardian:

In the past two decades, 10% of the earth’s wilderness has been lost due to human pressure, a mapping study by the University of Queensland has found... These pristine wild places exist in inhospitable locations: the deserts of Central Australia; the Amazon rainforest in South America; Africa; the Tibetan plateau in central Asia; and the boreal forests of Canada and Russia. They are being encroached on by logging, oil and gas exploration, mining, roads and agriculture.

“About 3 billion people around the world  — mostly in Africa and Asia, and mostly very poor — don't have access to modern energy and still cook and heat their homes by burning coal, charcoal, dung, wood, or plant residue indoors. These homes often have poor ventilation, and the smoke can cause a horrible array of respiratory diseases, including lung cancer... Indoor air pollution gets surprisingly little attention for such a lethal public health problem. It kills more people each year than HIV/AIDS and malaria combined, but few countries treat it as a crisis on the same level.” - Vox

On the two year anniversary of the Deepwater Horizon oil spill in the Gulf of Mexico, it's worth putting the size of that spill into context. By the time it was capped on July 15, 2010, the well had released 4.9 million barrels of oil into the Gulf, making it the largest accidental oil spill in history.

The significance of the Berkley Earth Surface Temperature study is that it was performed by prominent climate change skeptic Richard Muller. Prior to this study, Dr. Muller was a leading voice of climate change skepticism, casting doubt on both the idea that the earth is warming, and that humans are the cause. The land surface temperature trend (previous graph) led Muller to conclude that the earth is warming. 

Muller then studied issues raised by skeptics, such as possible biases from urban heating, data selection, poor station quality, and data adjustment. He concluded that these do not unduly bias the results. He further concluded that many of the changes in land-surface temperature can be explained by a combination of volcanoes and a proxy for human greenhouse gas emissions. Solar variation does not seem to impact the temperature trend.  Muller demonstrated that the upward temperature trend is likely to be an indication of anthropogenic changes, namely carbon dioxide emissions.

These results led Muller to announce in a NY Times Op-Ed that his research shows the earth is warming and that "humans are almost entirely the cause", referring to himself as a converted climate change skeptic.

Coal's share of U.S. electricity generation has been steadily declining, a result of market forces, particularly the low price of natural gas and the expense of building new coal plants. Since throughout its life cycle coal is arguably our dirtiest fuel source (from mountaintop removal mining, to mercury and air toxics released during combustion, to carbon emissions, to hazardous coal ash), a move away from reliance on coal benefits public health, the environment and the climate.

NASA map shows temperature anomalies from March 13-19, 2012 as compared to the same eight day period during the past 12 years. Red = warmer than normal. Blue = cooler than normal. Based on data captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra satellite.

Glacier area on Mount Kilimanjaro on the Kenya/Tanzania border in East Africa decreased 85% 1912-2007; from 12.06km2 to 1.85km2. While the loss of glaciers in temperate regions (such as those in the U.S.) has been attributed to warming temperatures from climate change, glacier loss on Kilimanjaro is more likely a result of a local climate change in East Africa that occurred in the late 1800s, resulting in a drier climate. However, causes of the dramatic glacier loss remain largely unknown.

Source: Thompson, L. G., Hardy, D. R., Mark, B. G., Brecher, H. H., & Mosley-Thompson, E. (2009). Glacier loss on Kilimanjaro continues unabated. Proceedings of the National Academy of Sciences of the United States of America, 106(47), 19770-19775.

A study of "fossil beaches", those areas where geology and fossils show they were once pre-historic coasts, is aiming to give us a better picture of the threat of sea level rise. Researchers acknowledge that, even during natural climatic shifts, carbon dioxide is the primary driver of global warming and cooling. During the Pliocene, carbon dioxide was at 400ppm and sea level was much higher. We are currently at 393ppm and rising. We are likely to cross over 400ppm in the next several years. Thus, looking at sea level rise during the Pliocene can give us a picture of what sea levels may look like as a result of current global warming. This map shows where the coastline was in the U.S. during the Pliocene.

Changes in US tree cover since 2000 (purple is gain, red is loss)