Question

removes the oil trapped inside. contact local authorities to check if its safe to dispose of drained oil filters in the regular trash; however its strongly recommended that used filters be recycled.
old units and components
old units and components such as: batteries, catalytic converters, used airbags, etc... can be disposed by sending them to local disposal facility, recycler or community drop - off centers.
cleaning products
parts cleaners and vehicle wash products are often toxic and some are flammable. they can not be disposed in regular trash or washed down the drain. small and large quantities of liquids leftover can be collected in sealed containers and send to your local waste disposal facilities.
volatile materials
the main volatile wastes in a motor vehicle is the vehicle fuel and the components that have contact with it, these components including: fuel filter, fuel tank, fuel pump, fuel lines, fuel injectors, etc... because the high flammability of these waste, they should be treated with extra care! keep them away from any source of heat or fire. do not dispose of them in regular trash or bury them in the soil. send them to professional disposal facilities or check with your local authority for more information.
in general, how should you dispose of automotive wastes?
collect all the liquids and solids together and bury them in the soil.
collect them by categories and send them to your local recycle service.
collect them and burn them in the atmosphere.

Explanation:

The text advises sending different automotive wastes like oil - filters, old units, cleaning products, and volatile materials to local disposal facilities, recyclers, or community drop - off centers depending on the type. It also warns against burying or burning them in improper ways. So, collecting by categories and sending to local recycle service is the correct way.

Answer:

Collect them by categories and send them to your local recycle service.