ALT Screenshot shows nightscape of a city or town in the foreground and some industries with smoke bellowing from their chimneys in the background against the sky This is followed by text as follows: According to some geologists, the Anthropocene epoch is defined by markers of human activity — including fossil-fuel emissions — that have altered Earth. Credit: Jochen Tack/Alamy

ALT Screenshot has a pic followed by the text: Coral grows on an oil rig in Flower Garden Banks National Marine Sanctuary, in the Gulf of Mexico.Credit: Flip Nicklin/Minden Pictures/Alamy The text aptly describes the pic in screenshot

ALT Screenshot of table showing: Defining the Anthropocene: nine sites are in the running to be given the ‘golden spike’ designation They are defined under the following four headings: Site Location Material type How it captures signs of human activity

ALT Screenshot has a pic and text below it as follows: This golden spike in the Flinders Ranges of South Australia was approved by geologists in 2004, to mark strata exemplifying the Ediacaran period.Credit: James St. John (CC BY 2.0) The above text aptly describes the pic