Air pollution is an all-India crisis, with many parts of North India recording severe air pollution, Delhi Chief Minister Arvind Kejriwal said today as air quality in Delhi continued to remain in the 'severe' category for the second consecutive day. "We take full responsibility for increasing farm fires in Punjab," he said, adding that it has been just six months since they formed a government in Punjab. "We have taken steps to control it. Stubble burning will come down by next year," he said.