You can activate a variety of boosters at the lab using gems, giving your town temporary upgrades. Here are the boosters available at the moment:
Super-harvest: fields yield twice as much.
Advanced farming: animals produce twice as much.
Generous customer: orders earn twice as many coins.
Favorable voyage: ingots are twice as efficient when sending off ships.
See the light: makes ore and artifacts from the darkened areas in the mine visible.
Vibrant market: the items at the market are updated twice as often.
High-speed production: goods at your factories take 30% less time to produce.
Efficient smelting: ingots take 50% less time to produce.
Active cooperation: new requests can be made in 30% less time.
There are also 8 boosters which you can obtain for free during events or purchase with tokens at the Yacht Club. These boosters are not purchasable with gems.
Rich fields: crops are ready 40% faster.
Profitable flight: filling plane crates earns twice as many coins.
Record demand: new orders at the helicopter pad appear 80% faster.
Shortcut: trains arrive twice as fast.
Smart navigation: ships arrive twice as fast.
Busy trade: dealer's break time cut in half.
Spacious barn: increases barn capacity by 20%.
Large request: requests in the co-op chat bring 30% more goods.
Extra Pair of Hands: two products are produced at a factory simultaneously.