Environmentalists worry that climate change could cause problems with rising sea levels and crop failures in the coming decades, but one group of researchers has found it’s already causing health problems now. Temperature increases linked to climate change are worsening air pollution in communities across the country right now contributing to a range of health problems from asthma to premature death, according to a new report from the American Lung Association. The total number of Americans exposed to unhealthy air rose to nearly 134 million, according to the group’s 2018 State of the Air report.