While electric cars are helping reduce global emissions, the electricity used to recharge them often uses non-renewable energy sources that generate greenhouse gases. To help lower the use of non-renewable energy sources, Toyota is trialing a new Clean Assist program in California for owners of the Prius Prime and RAV4 Prime that offers carbon-free charging.

Now, General Motors is teaming up with Shell to offer new energy services for eligible owners including a fixed-rate home energy plan that uses 100 percent renewable energy resources. Currently, this program is available for eligible owners of Chevrolet, Buick, GMC, and Cadillac vehicles in Texas.

As part of GM and Shell's partnership, some of these home energy plans also include free overnight home charging for electric cars like the Bolt EV and EUV. In addition, GM suppliers will gain access to a "tailored suite of renewable energy products" to help achieve their emissions-reduction goals. These plans will help EV owners reduce emissions, while the option of free overnight charging will help lower running costs.

By 2035, General Motors will only sell zero-emissions vehicles and aims to be completely carbon neutral by 2040. "Addressing climate change requires incredible scale," said Kristen Siemen, chief sustainability officer at General Motors.

"At GM, we're committed to helping bring everybody in on a more sustainable future," the company has said. Shell, on the other hand, plans to become a net-zero emissions energy business by 2050.

"Shell is working across many sectors to help address greenhouse gas emissions and to serve as a partner for change," said Glenn Wright, vice president of Renewables and Energy Solutions, Shell. "We see opportunities amidst the challenges of the energy transition, and we are excited to work with GM to provide options for consumers and businesses focused on their emissions impact." For now, GM and Shell's renewable energy plans are only available to eligible owners in Texas, but the service will be expanded to other US markets in the future.