Apple today revealed  that it has nearly doubled the number of suppliers using only clean energy for manufacturing work, including two that assemble and make the processor chips for iPhones.
Cupertino, California-based Apple last year said it meets all of its needs with renewable energy such as solar farms that power data centers. But a large part of its carbon footprint comes from its supply chain, and since 2015 Apple has worked directly with those companies to use clean energy for Apple production.

Forty-four companies are now in the program, Apple said on Thursday, including Hon Hai Precision Industry, whose Foxconn unit makes iPhones, and Taiwan Semiconductor Manufacturing, which supplies the A-series chips that power all of Apple’s mobile devices. Apple had previously disclosed 23 suppliers in the program.

Apple’s green suppliers

# Advanced International Multitech
# Arkema
# AT&S
# Bemis Associates
# Biel Crystal (HK) Manufactory
# BOE
# Catcher Technology
# Compal Electronics
# Corning
# COSMO
# DSM Engineering Plastics
# ECCO Leather
# Fastway Creation
# Finisar
# Goertek
# Golden Arrow
# H.B. Fuller
# Hon Hai Precision Industry
# Ibiden
# Jabil
# LEALEA Enterprise
# Lens Technology
# Lishen
# Luxshare-ICT
# Mega Precision
# Nidec
# Pegatron
# Primax Group
# Qorvo
# Quadrant
# Quanta Computer
# RRD
# RyPax
# SanHuan
# SDK
# Solvay
# STMicroelectronics
# Sunway Communication
# Sunwoda Electronics
# Taiyo Ink Mfg. Co.
# tesa SE
# TSMC
# Wistron
# Yuto

Apple did not specify where the new suppliers in the program would get the clean energy. It encourages suppliers to build their own renewable energy projects, such as when iPad assembler Compal last year built rooftop solar installations on its factories in China.

Apple says it aims to have suppliers sign power-purchase agreements with new renewable energy projects and using purchases of renewable energy credits only when there are no other options.

Lisa Jackson, Apple’s vice president of environment, policy and social initiatives, said that the company is on track to pass its goal of adding 4 gigawatts of renewable energy to the grids of its supply chain by 2020.

Lisa Jackson declined to say whether Apple would drop suppliers such as Foxconn and TSMC – whose capabilities few others in the global electronics supply chain can match – if they fail to meet their commitments to the program.

Apple has reduced its comprehensive carbon footprint for the third year in a row in 2018, in large part due to the company’s Supplier Clean Energy Program. Manufacturing makes up 74 percent of Apple’s carbon footprint.