2011 was a big year for the environment, in some good ways and some bad ways. Here’s a quick run-down of the top 10 stories of the year, in my opinion: 1. Tremendously high levels of carbon emissions continue to warm Earth. Despite efforts to switch to clean energy, increase energy efficiency, and use more
extreme weather food
Worldwide, high crude oil prices, increasing extreme weather events, population growth and economic development of poorer countries, crop-based biofuels, political conflict and unrest in the Middle East, and slowing crop yield growth are all factors contributing to rising food prices.