Here is the second half of ClimateProgress’ summary of the IPCC
summary: It is often more cost-effective to invest in end-use
energy efficiency improvement than in increasing energy supply
to satisfy demand for energy services. Efficiency improvement
has a positive effect on energy security, local and regional air
pollution abatement, and employment. Energy efficiency options
for new and existing buildings could considerably reduce CO2
emissions with net economic benefit. Many barriers exist against
tapping this potential, but there are also large co-benefits
(high agreement, much evidence). By 2030, about 30% of the
projected GHG emissions in the building sector can be avoided
with net economic benefit. Changes in lifestyle and behaviour
patterns can contribute to climate change mitigation across all
sectors. Management practices can also have a positive role.
While studies use different methodologies, in all analyzed world
regions near-term health co-benefits from reduced air pollution
as a result of action