Yes, we know most of the news about global warming is doom and gloom. But the tide is changing. The Guardian, normally not the most optimistic source for news, put together 10 reasons why we may beat the challenge of climate change. Some of the hopeful signs: According to an International Energy Agency the cost of installing solar has dropped by 66% in 6 years. European homes have cut energy consumption by 15% in the past 14 years. Since 2011 electric car sales have doubled year over year. Read all the 10 reasons here.