If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
National Science Foundation Discovery article on tomatoes’ wild relatives
Website on ecosystem services
Article on the economic and social value of mangroves and shrimp farms
American Museum of Natural History website on the New York water story
Map of New York City’s water supply system
Article on the critical role microbes can play in ecosystems
Article on the complex interactions being discovered in tropical rainforests and the benefits to humans
National Geographic News story on the importance of mangrove ecosystems as nurseries
Common Core State Standards
Next Generation Science Standards