Discover and read the best of Twitter Threads about #bng

Most recents (3)

Biodiversity Net Gain. Wish there was actual, empirical evidence about what it might really mean for your company/local authority/England’s nature?

Our @DICE_Kent-led new paper in @ConLetters reports the results of the 1st evaluation of #BNG…. Monster🧵
TLDR: Under #BNG, we lose open greenspace, traded for promises to deliver smaller, higher quality habitats in future. Offset system might be tiny: 95% of units in our sample delivered within development footprints themselves. Governance & the Metric need URGENT improvement.
Environment Bill is expected to mandate that all new developments under the Town & Country Planning Act achieve a mandatory net gain in biodiversity, measured using the Biodiversity Metric (3.0 released soon). Mandatory #BNG expected to be implemented nationally from autumn 2023.
Read 27 tweets
As an academic working on understanding & how to get the best possible nature outcomes for #Biodiversity #NetGain #BNG, let me share a major worry that I see barely discussed at all, & which unaddressed could decimate the biodiversity impacts: 'cost-shifting'. /1
Cost-shifting occurs when an offsetting / biodv compensation policy is introduced under the rationale that nature conservation is underfunded, so we need new private finance to make up the shortfall. So, we set up offsetting to charge developers for their biodv impacts. /2
Fundamental idea here is that offsetting provides funding that is *additional* ie would not have been provided before. So, it assumes that conservation funding post-introduction of offsetting = funding from government before + funding from private sector through offsetting. /3
Read 12 tweets
As mandatory Biodiversity Net Gain inches closer, update all on what the data says the impacts of #BNG will currently be on England's nature, without further changes. 📢📢📢Updated results of our database of all development projects within councils with Net Gain policies 📢📢 /1
Database now spans ~6000 new homes & industrial, research, transport, energy, & health/social care infrastructures; ~800 individual habitat patches. It's now a pretty good picture of where #BNG is leading. Built with @wildbusiness & team of wonderful forward-thinking planners /2
Headline results: #BNG currently associated with a 36% loss of area devoted to non-urban habitats (so urban habitats cover 16% of total footprint of development boundaries under baseline, and 50% under post-dev scenario). BUT, urban is mostly replacing croplands & pasture /3
Read 15 tweets

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