After a year of erratic weather, a large majority of New Jersey residents consider climate change and global warming a real concern — and they also expect government to start taking a bigger role in protecting the environment, according to a Kean University/NJ Speaks poll released today. The possible effects of climate change and global warming were a concern for 71 percent of respondents in the poll, and nearly all of those, 69 percent, said human activity has contributed to global warming and other environmental problems.