He took a picture of his creation with a drone and posted it on Twitter in hope Trump would spot the unwelcoming message upon landing.
The post since went viral with over 5000 likes and more than 3500 retweets.
Nancarrow told Metro that he had been interested in climate change for quite a while and saw this as a perfect opportunity to protest against Trump.
"Hopefully he flew over it, but if not, he's definitely seen it on social media by now.
"This is not anti-Trump, this is saying, look you need to start realising that climate change is a real thing and if we don't do anything about it then we're all a bit screwed."
According to Metro, the teen took time out of A-level revision to create the protest, but said he had no problems passing the exam.
The teenage is the founder of Born Eco, a middle-man website that connects shoppers with eco-friendly traders.