Telephone.. the natural calmities were there buy not so closly placed, we need to understand the balancing acts of nature.. till 18th century we had some balance.. in 19th century, we have had rapid industrialisation and effluent disposal into nature causing global warming.. scients have indications that there will be not ice cap during the coming summer ! are these enough cause for concern..? are we going to take global measures or blame on America and China and sit twiddling our thumbs