In 37 of 40 nations surveyed, willingness to curb emissions that may contribute to
warming the planet exceeds intense concern about climate change.
Not exact matches
That's the threshold that the scientific consensus says we must not
exceed if we're to avoid the grimmer consequences of a
warming planet.
As humans release ever - larger amounts of carbon dioxide into the atmosphere, besides
warming the
planet, the gas is also turning the world's oceans more acidic — at rates thought to far
exceed those seen during past major extinctions of life.
That brings us to the second problem: Yes, swapping out coal for natural gas does reduce carbon emissions initially, but in fact it ultimately doesn't help the
planet avoid a rise of 2 degrees Celsius over the coming decades, the limit scientists around the world say we must not
exceed in order to prevent the worst impacts of global
warming.
Second, CO2 levels
exceeding 350 ppm are creating a
planet warmer than humans have ever lived in and are disrupting the physical and biological systems in which human civilization has developed.
Indeed, the market conditions and policies necessary to make the tar sands a cost - effective source of energy will almost certainly result in dangerous levels of global
warming that will
exceed two degrees Celsius, the internationally agreed upon limit that will prevent climate change from destroying the
planet.
Record carbon emissions have lifted the Earth's temperature about 0.8 degrees Celsius since the industrial revolution, and the
planet is on a path to
exceed the UN-endorsed maximum of 2 degrees Celsius (3.6 degrees Fahrenheit) of
warming by 2100.
If we
exceed the world carbon budget of one trillion tons burned (RCP 4.5, 6.0 and 8.5), the models project the
planet will keep
warming and it will be virtually impossible to bring global average temperature back under the two degrees Celsius threshold.