Enhancing vehicle efficiency to halt climate change Enhancing vehicle efficiency is another potential solution to halt climate change. Transport is a major contributor of greenhouse gases, currently accounting for 26% of GHG emissions (Chapman et al 2007, p.354). Therefore, Springer et al (2014, p.1) advocate a global effort to increase vehicle efficiency through establishing stringent efficiency standards for vehicles and improving vehicle technologies. While companies cannot always support new efficiency standards due to the probably high costs of technology and facilities, consumer acceptance for efficient vehicles is increasing, which paves the way for long-term efficiency standards (Springer et al 2014, p.14). Additionally, Chapman et al (2007, p.357) note that although costly investment in efficient technologies is required for wider deployment, transitioning to fuel-efficient vehicles will achieve sustainability benefits in the long term.