Apple has issued a 'green bond' to help tackle climate change

Apple Inc offered a $1 billion bond dedicated to financing clean energy and environmental projects on Tuesday, the first corporate green bond offered since President Donald Trump withdrew the United States from the Paris climate agreement.

The offering comes over a year after Apple issued its first green bond of $1.5 billion - the largest issued by a U.S. corporation - as a response to the 2015 Paris agreement.

Apple said its second green bond is meant to show that businesses are still committed to the goals of the 194-nation accord.

“Leadership from the business community is essential to address the threat of climate change and protect our shared planet,” said Lisa Jackson, Apple's vice president of environment, policy and social initiatives.

Apple Chief Executive Tim Cook was one of several CEOs who directly appealed to Trump to keep the United States in the pact before he made his decision.

The tech giant said proceeds from the green bond sales will be used to finance renewable energy, energy efficiency at Apple facilities and in its supply chain and procuring safer materials for its products.

The offering also includes a specific focus on helping Apple meet a goal of greening its supply chain and using only renewable resources or recycled material, reducing its need to mine rare earth materials.

Last year, Apple allocated $442 million to 16 different projects from renewable energy to recycling from its first bond offer.

One of the projects it funded was a robotic system called Liam to take apart junked iPhones and recover valuable materials that can be recycled, such as silver and tungsten - an attempt to address criticism that Apple's products, while sleek and seamless in design, are so tightly constructed that their components can be difficult to take apart.

Although green bonds comprise a small fraction of the overall bond market, demand has grown significantly as investors seek lower-carbon investments.

In 2016, $81 billion of green bonds were issued, double the number from 2015, according to the Climate Bonds Initiative, an organization that promotes the use of green bonds.

Governments are also embracing the use of green bonds as a way to meet a 2015 pledge by world leaders to limit global warming this century to below 2 degrees Celsius.