I want to know the answer to the following question:
What has the pits from the Tuvalu air runways construction  impacted?
All the background I'm provided with is that "Since 1994 a project has been in development to assess the environmental impact of transporting sand from the lagoon to fill all the borrow pits and low-lying areas on Fongafale.". Is that enough to answer the question?
Answer: no