From 1800 to 1899, nothing much happened; the world got a little warmer, and the seas rose a little. Suddenly, in 1900, nothing much happened; nothing much had happened before, and nothing much was happening again. A distinct trend was developing. From 1901 to the present, June 29th. 2012, the trend continued, the Earth got a little warmer, and the seas rose a bit, and so nothing much happened.
Clearly, citizens of the Earth must take action to stop this worrying trend; if we do nothing, nothing much will continue to happen, and who knows what the result might be.