Add spaces: HausamCheckpointCharlie–amuseumattheoldbordercrossingbetweenEastandWestBerlin.

Answer: Haus am Checkpoint Charlie – a museum at the old border crossing between East and West Berlin.

Add spaces: Coalgas,watergas,producergas,leangasandsimilargases(excl.petroleumgasesandothergaseoushydrocarbons)

Answer: Coal gas, water gas, producer gas, lean gas and similar gases (excl. petroleum gases and other gaseous hydrocarbons)

Add spaces: ReducedsnowcoverwillmeanthattheEarthabsorbsmoreheatfromthesunandoceancurrentsshift.

Answer:
Reduced snow cover will mean that the Earth absorbs more heat from the sun and ocean currents shift.