We are therefore experiencing a probably unprecedented rise in CO2 before temperature rise, and this rise is clearly coming from human industry. (illconsidered.blogspot.ru)
The upturned blade of the stick, at the right, indicated an abrupt and unprecedented rise since the mid-1800s. (scientificamerican.com)
• Such unprecedented rising temperatures — combined with anticipated rapid industrialization of the developing world — suggests we run a great risk of pushing the climate past a «tipping point» within a lifetime. (dotearth.blogs.nytimes.com)