Oil, coal, and natural gas are the three main types of fossil fuels.
Most people band miniature goats, but when they're big enough, you can use other tools. It is possible to castrate older goats; over 4months, without much trouble at all if you use a correct tool.weeks minimum age, but if you plan to neuter them later then 6weeks, remove the buckling(s) to a separate pen from their sisters/dams. They can breed as early as 7weeks, so you have to be very careful.
An entire male goat is called a buck. A castrated male goat is called a wether. A female goat is called a doe.