We have committed to publishing a heat policy roadmap in 2020. This will set out our plans to deliver the low carbon heat needed to meet our climate targets, and a programme of work to enable key strategic decisions in the first half of the 2020s on how we achieve mass transition to low carbon heating.
In the meantime, we continue to support low-carbon heating through the Renewable Heat Incentive and the Heat Networks Investment Programme, and we are developing policies to deliver low carbon heating in the 2020s and meet our climate targets. A Future Homes Standard, introduced by 2025, will require new build homes to be future proofed with low carbon heating and world leading levels of energy efficiency. We are also committed to phasing out the installation of fossil fuel heating systems in off gas grid properties and accelerating the decarbonisation of our gas supplies by increasing the proportion of green gas in the grid. We will be consulting on these commitments in due course.
We are preparing an ambitious, cross-modal Transport Decarbonisation Plan to step up our efforts and deliver the carbon emission reductions needed for the sector to play its part in reaching net zero by 2050. On roads, delivering on our Manifesto commitment, we will soon consult on the earliest date we can phase out the sale of new conventional petrol and diesel cars.