The phrase "amount of rainforest" is correct and usable in written English.
It can be used when discussing the quantity or extent of rainforest areas, often in environmental or ecological contexts.
Example: "The amount of rainforest in the Amazon has decreased significantly over the past few decades due to deforestation."
Alternatives: "extent of rainforest" or "quantity of rainforest".
Even if we are destroying less rainforest each year, we are still reducing the amount of rainforest left for future generations.
Then, members of the Consumer Goods Forum pledged that by 2020 they would no longer buy palm oil from any company that decreased the net amount of rainforest.
The cost of meat is rising, not just in terms of hard cash but also in terms of the amount of rainforest that is destroyed for grazing or to grow feedstuff for cattle.
In the early part of the 21st century, the amount of rainforest destroyed declined significantly.
In any immediate sense these make no difference to the number of pandas or the amount of rainforest.
It's essential that REDD money is well spent -- and in theory, it's the job of McKinsey to figure out the cheapest possible way to save the largest possible amount of rainforest.
His other son, the friendly and bumbling Jose Sarney Filho, is national president of the Green Party and the former Federal Environmental Minister who cut the amount of preserved Amazon Rainforest in half while serving under Fernando Henrique Cardoso.
Not only does deforestation reduce the amount of carbon dioxide that a rainforest can absorb, but an unexpected weather event, such as a drought (which some scientists believe may itself be a result of climate change), can actually reverse a rainforest's role, causing it to emit carbon dioxide rather than absorbing it.
In the last decade, more than 200 million acres of rainforest have been cleared and burned, sending an amount of pollution into the atmosphere equivalent to seven times the United States' annual emissions.
You'll want to don your waterproofs: this area has been called the Celtic rainforest because of the amount of precipitation that falls here.
As a result, these rapidly expanding woody vines are increasingly shading and choking rainforest trees, reducing the amount of carbon they sequester from the atmosphere.
