On September 11, 2001, at 8:45 AM a Boeing 767 with 20,000 gallons of jet fuel crashed into the north tower of the World Trade Center in New York City. The crash left a hole on the 80th floor of the 110 story skyscraper killing hundreds of people and trapping everyone in higher floors. 18 minutes later another Boeing 767 crashed into the south tower of the World Trade Center near the 60th floor.
Anya's Ghost is a coming-of-age ghost story in graphic novel format. The first book by cartoonist Vera Brosgol, Anya's Ghost was published on June 7, 2011.
(1) the time traveller explores the wells and finds a complex network of undeground tunnels.(2) the traveller encounters the sub morlocks(3) the traveller realizes people of the future belong to two different races called "eloi and morlocks."(4) the traveller finds his machine missing(5) traveller saves weena from drowning(6) the travller realizes the morlocks have his machine.
the exact definition of natural vegetation is a cover of plants that can grow alone with little to no human interference, so i believe this fits your description best!