▁de br is ▁ ▁An ▁average ▁of ▁about ▁one ▁track ed ▁object ▁per ▁day ▁has ▁been ▁dro pping ▁out ▁of ▁orbit ▁for ▁the ▁past ▁ 5 0 ▁years , ▁aver aging ▁almost ▁three ▁objects ▁per ▁day ▁at ▁solar ▁maximum ▁( due ▁to ▁the ▁he ating ▁and ▁expansion ▁of ▁the ▁Earth ' s ▁atmosphere ), ▁but ▁one ▁about ▁every ▁three ▁days ▁at ▁solar ▁minimum , ▁usually ▁five ▁and ▁a ▁half ▁years ▁later . ▁In ▁addition ▁to ▁natural ▁atmos pher ic ▁effects , ▁corpor ations , ▁academ ics ▁and ▁government ▁ag encies ▁have ▁proposed ▁plans ▁and ▁technology ▁to ▁deal ▁with ▁space ▁de br is , ▁but ▁, ▁most ▁of ▁these ▁are ▁theoretical , ▁and ▁there ▁is ▁no ▁ext ant ▁business ▁plan ▁for ▁de br is ▁reduction . ▁ ▁A ▁number ▁of ▁sch ol ars ▁have ▁also ▁observed ▁that ▁institution al ▁factors — polit ical , ▁legal , ▁economic ▁and ▁cultural ▁" rules ▁of ▁the ▁game " — are ▁the ▁greatest ▁imped iment ▁to ▁the ▁clean up ▁of ▁near - E arth ▁space . ▁There ▁is ▁no ▁commercial ▁in cent ive , ▁since ▁costs ▁aren ' t ▁assigned ▁to ▁poll ut ers , ▁but ▁a ▁number ▁of ▁suggestions ▁have ▁been ▁made . ▁However , ▁effects ▁to ▁date ▁are ▁limited . ▁In ▁the ▁US , ▁government al ▁bodies ▁have ▁been ▁accused ▁of ▁back sl iding ▁on ▁previous ▁commit ments ▁to ▁limit ▁de br is ▁growth , ▁" let ▁alone ▁tack ling ▁the ▁more ▁complex ▁issues ▁of ▁removing ▁orb ital ▁de br is ." ▁The ▁different ▁methods ▁for