Reuters: A UN panel which supervises trade in carbon offsets under the Kyoto Protocol is probing tweaks to the rules as there is evidence of attempts to make excessive profits, its vice-chair Lex de Jonge said. Rich countries can meet their binding caps on greenhouse gas emissions by funding emissions cuts in developing countries under the Kyoto Protocol’s clean development mechanism (CDM) through a currency of carbon offsets. The scheme has attracted speculators who establish …