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Impacts of climate change on the future of biodiversity

Many studies in recent years have investigated the effects of climate change on the future of biodiversity. In this review, we first examine the different possible effects of climate change that can operate at individual, population, species, community, ecosystem and biome scales, notably showing that species can respond to climate change challenges by shifting their [...]

Avoiding bio-perversity from carbon sequestration solutions

The development of a new carbon economy has the potential to offer win–win outcomes for environments and economies. Large-scale tree plantations are expected to play a major role in carbon economies but could have negative ecological and economic consequences when key environmental values such as biodiversity conservation are not considered. We discuss three potential “bio-perversities”—negative [...]

Rumination: Should the US Federal Government be Supporting Bioenergy?

A former Bush administration energy and environment official, Douglas Faulkner, has initiated a dialog on bioenergy at Biofuels Digest. Ta launch the discussion, Mr. Faulkner asks: 1.     Do you agree with my premise of reduced federal support for bioenergy? 2.    And, if so, as leading members of the private sector, are you willing to help [...]

Rumination: President Obama’s State of the Union Address 2012 and the Environment

Here is what President Obama said about energy and the environment in the State of the Union address of 1/24/2012: “Nowhere is the promise of innovation greater than in American-made energy. Over the last three years, we’ve opened millions of new acres for oil and gas exploration, and tonight, I’m directing my Administration to open [...]

Politically Feasible Emissions Targets to Attain 460 ppm CO2 Concentrations

A new climate change treaty must address three current gaps: the absence of emissions targets extending far into the future; the absence of participation by the United States, China, and other developing countries; and the absence of reasons to expect compliance. Moreover, to be politically acceptable, a post-Kyoto treaty must recognize certain constraints regarding country-by-country [...]

Simultaneously Mitigating Near-Term Climate Change and Improving Human Health and Food Security

Tropospheric ozone and black carbon (BC) contribute to both degraded air quality and global warming. We considered ~400 emission control measures to reduce these pollutants by using current technology and experience. We identified 14 measures targeting methane and BC emissions that reduce projected global mean warming ~0.5°C by 2050. This strategy avoids 0.7 to 4.7 [...]

The Technology Path to Deep Greenhouse Gas Emissions Cuts by 2050: The Pivotal Role of Electricity

Several states and countries have adopted targets for deep reductions in greenhouse gas emissions by 2050, but there has been little physically realistic modeling of the energy and economic transformations required. We analyzed the infrastructure and technology path required to meet California’s goal of an 80% reduction below 1990 levels, using detailed modeling of infrastructure [...]