Lomborg's most contentious assertion, however, involves global warming. From the outset, Lomborg "accepts the reality of man-made global warming" though he refers to a number of uncertainties in the computer simulations of climate change and some aspects of data collection. His main contention involves not the science of global warming but the politics and the policy response to scientific findings. Lomborg points out that, given the amount of greenhouse gas reduction required to combat global warming, the current Kyoto protocol is grossly insufficient. He argues that the economic costs of legislative restrictions that aim to slow or reverse global warming are far higher than the alternative of international coordination. Moreover, he asserts that the cost of combating global warming would be disproportionately shouldered by developing countries. Lomborg proposes that since the Kyoto agreement limits economic activities, developing countries that suffer from pollution and poverty most, will be perpetually handicapped economically.