In addition, European Countries and North America also suffers more intense and long-lasting heat wave than ever. .
As has been proved, climate is quiet closely in association with ecosystems. Therefore the huge change of climate will definitely lead to ecological risks. First of all, the increase of greenhouse gases lead to the increase of ocean acidity. Through searching the research literature, the level of ocean acidity has already been 10 times higher than 55 million years ago (Wingenter, 2007). And this change has a huge impact on ocean system. For instance, the increase of ocean acidity could resolve carbonate ions, which is essential to the formation of marine organisms. Secondly, it increases the extinction of biodiversity. Due to the increase of melting ice and sea level, it has great influence on biodiversity in Arctic area. Such as, as the food chain is damaged due to less ice, the life of polar bear is threaten, which has gotten attention from media. One fragile ocean organisms like coral reef is facing the threat of extinction. According to the statistics in 2004, 20% of world reef has been damaged and show no prospect to recover in a certain degree (Shah, 2014). Given the scientific forecast, climate change could destroy the extinction of biodiversity globally, in which some species could be extinct from the world. Meanwhile the recovery of them could take hundreds of years. On the other hand, the biodiversity in land also face a challenge. For example, based on the authoritative journal Science, in 2080, 20% of world's lizard patterns could have been vanished (Davies, 2013). In a word, the change of climate and global warming will break the balance of ecosystems into pieces. In future, the imbalance of ecosystems will be more obvious than ever. And it is a great risk to human civilization. .
Climate change and global warming also leads to some indirect risks, in which social risks are included.