Pretty respectable debut score <| sep |> These fires don ' t completely destroy forests . Most mature trees survive and the flora rejuvenates quickly because ash is basically fertilizer . Planting trees every year is tradition here Tu B ' Shvat , hence the net gain . <| sep |> People didn ' t know enough about motor vehicle design to not use pipe , then build elements out of a vehicle from pipe , then been sent home from a competitiontrackevent because they did . I . e . Drag Racing is a popular one . Don ' t build cages out of pipe . But I ' ve seen at least one case of a pipe frame being barred from a competition . You should check out the pits at your local dirttrack if you have one , outside the US there are ' redneck ' events as well . There you will see everything from simple brilliance to abject idiocy . There are ' tricks ' to every motorsport which never make it on the internet . Really interesting if you are at all concerned with any type of motor vehicle . Remember real motorsport is not WRCF 1 NASCAR . It ' s some dude shoving a rabbit down a rally track .