Google has increased spending in recent years on areas including cloud computing and consumer electronics that it views as essential to maintaining its industry leadership.
French investigators have been seeking to establish whether Google, whose European headquarters are based in Dublin, failed to pay its dues.
Google, Facebook and Twitter to testify before a US Senate panel on efforts by social media firms to remove violent content.
The new commitment by Alphabet Inc steps up the competition among tech companies aiming to show consumers and governments that they are curbing the environmental toll from their widening arrays of gadgets.
Several conservatives on social media have said they are attending the summit, including Bill Mitchell, a Trump supporter who hosts an online show.