the point is that these effects are difficult to predict. The challenge is that a changing climate may upset ecological balances in ways that are difficult to p

the point is that these effects are difficult to predict. The challenge is that a changing climate may upset ecological balances in ways that are difficult to predict and difficult to counter. Take the indian subcontinent as a great example. That is a region of a billion people dependent entirely on the monsoon for water. The region is surrounded by deserts to the west and north. If the monsoon is disrupted due to climate change, what will happen to those billion people? It's worse still if you consider that glacial meltwater from the himalayas also feeds China's largest rivers. On the flip side, too much rain and there is also a disaster. This is the point - we don't know what will happen but can be certain it will be bad.