Finance Asia: There is no silver bullet that will undo the effects of global warming, but markets can play a key role in encouraging businesses to use clean technologies. One of the cheapest ways to create such incentives is through so-called cap-and-trade schemes, said Paul Ezekiel, Credit Suisse’s global head of carbon trading. Ezekiel was speaking at the Credit Suisse Asian Investment Conference in Hong Kong yesterday. Time is running out though. Floods, hurricanes and droughts are categorised …