French President Emmanuel Macron on Monday said he would take all measures necessary to ensure that weed-killer glyphosate is banned in France as soon as an alternative is available and at the latest within three years.

Macron announced the move on Twitter after Germany defeated France in a tight vote in Brussels.

The EU vote cleared the use of glyphosate for the next five years after a heated debate over whether the weed-killer originally developed by Monsanto causes cancer. France had pushed for the whole bloc to renew the licence for only three years.

Despite the 5-year extension, EU rules allow France to unilaterally ban the substance. It has already decided to do so for private individuals in 2019.