Sentences with phrase «proposed planetary boundary»

Estimates of future land take for biofuels production range up to well over a billion hectares globally, more than double the 400 million hectares that remain if we are to respect the proposed planetary boundary.

We are perilously close to this proposed planetary boundary already, with 12 per cent of land already devoted exclusively to agriculture.

Not exact matches

Scientists propose a list of planetary boundaries for human impacts ranging from biodiversity loss to the global nitrogen cycle

Although the 2009 study's authors also noted no thresholds exist for some of their planetary boundaries they proposed limits on land - use change, freshwater, nutrients and biodiversity based on two criteria.

Johan Rockström of Stockholm University and his colleagues are proposing nine «planetary boundaries» in this week's Nature.

The loss is due to changes in land use and puts levels of biodiversity beyond the «safe limit» recently proposed by the planetary boundaries — an international framework that defines a safe operating space for humanity.

Roger A. Pielke, Jr., the always provocative University of Colorado political scientist, proposes that scientists who have concluded that humans are crossing perilous «planetary boundaries» are expecting too much influence over societal decisions related to energy and ressource use:

Steffen et al (2015) revise the «planetary boundaries framework» initially proposed in 2009 as the «safe limits» for human alteration of Earth processes (Rockstrom et al 2009).

The coming SDG (Sustainable Development Goals) framework includes a proposed set of four goals (oceans, climate, biodiversity and freshwater), which is a de-facto example of applying planetary boundary thinking to create a global framework for safeguarding a stable environment on the planet for societies and communities across the world.

The Planetary Boundaries framework proposes quantitative limits for human perturbation of critical Earth system processes, and a «safe operating space» within which human activity should attempt to stay in order to avert the risk of large - scale, possibly abrupt or irreversible environmental change.

The nascent literature proposes a number of different ways that planetary boundaries could theoretically be downscaled to national equivalents7, taking into account factors such as geography, international trade and equity8.

We downscale four planetary boundaries (climate change, land - system change, freshwater use and biogeochemical flows) to per capita equivalents, following the approach proposed by the Swedish Environmental Protection Agency9.

As the authors of the concept admit, six of the nine proposed «planetary boundaries» have no global limits at all.

Last week officials announced that the proposed Rio +20 framing document endorses the notion that there are hard ecological limits — «planetary boundaries» — to human development.