The deforestation of the Amazon is largely driven by a desire for more land to grow biofuels (sugarcane) on.
The byproducts of sugar production (the leaves and stalks) are used to produce ethanol from a biological, renewable source, as opposed to fossil fuels.
Oh, and in the Amazon, said sugarcane farming is often done by slaves.
You either need more farmland to grow what will become biofuels on it, or you have to stop growing food on existing farmland, which means food gets more expensive.
As with many insufferable elements of modern society, you can blame Elon for this one too.