High pressure gas pipelines require extensive clearing and digging of deep trenches (1-2m) to enable pipelines to be buried.  Pipelines are particularly damaging where soils are highly erodible or acidic, where they cross rivers and creeks, and where they affect important farmland or wildlife habitats.  They can also represent a threat to cultural sites.                               

As well as the direct impacts of clearing of vegetation or farmland, and disruption to landholder operations, some of the key risks from high pressure gas pipelines include:

1. Fires or explosion caused by ignition of natural gas
2. Erosion of soils and pollution of waterways
3. The spread of weeds and diseases through extensive vehicle movements
4. Property devaluation due to concerns about the risks associated with pipelines
5. Greenhouse gas emissions from venting and leaks from pipelines
6. Health risks associated with living near gas pipelines

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