Never pour grease or oils down sink drains or into toilets. You should scrape grease and food scraps into a can or wipe with a paper towel. Then place into the trash for disposal or for recycling into your green can when this service is available. It's advisable to put baskets/strainers into sink drains to catch food scraps and other solids and then empty them into the trash or compost recycling.
When FOG is allowed to go down your drains, it can lead to a sewage back up in your home or business and may lead to other issues affecting our environment. Over time a layer of FOG will build up and restrict the flow of wastewater which can bring about a sanitary sewer overflow (SSO). A build up of FOG can also precipitate costly repairs at wastewater treatment plants and will increase problems with pests and vermin. Commercial kitchens are regulated to help prevent SSOs caused by FOG. For more information, view SASM's "Pollution Prevention Starts in the Kitchen (PDF)".