More recently he and colleagues calculated that the relentless increase in carbon dioxide levels in the atmosphere could limit the growing season and pose a threat to world food security. (climatenewsnetwork.net)
As atmospheric carbon dioxide levels rise, short - and long - term solutions are needed to store carbon removed from the air. (pnnl.gov)
This modification will also help plants take advantage of rising carbon dioxide levels in the atmosphere. (newscientist.com)