The number of threatened plants and animals in NSW continues to climb and impacts on biodiversity and the economy from climate change will keep intensifying, according to the latest State of the Environment Report.

Critics say the triennial report, released to parliament on Thursday, probably underplays the extent of the threats because some figures - such as land clearing rates - are only provided to 2014-15, and have accelerated since as native vegetation controls have eased.

Land clearing near Croppa Creek in northern NSW. Credit:Via Facebook

The number of threatened species has risen three per cent since the last report in 2016, with 1025 varieties of plants and animals deemed at risk of extinction. Some 112 ecological communities are also at risk.

"The main threats to these species are habitat loss due to the clearing and degradation of native vegetation, and the spread of invasive pests and weeds," Mark Gifford, acting chair and chief executive of the Environment Protection Authority, said.