Assertion: lead | /r/AtLocation | gasoline
Facets:
value: to reduce engine knocking
type: PURPOSE
value: no longer
type: TEMPORAL
value: for many years
type: TEMPORAL
value: because of health concerns
type: CAUSE
Source sentences:
text: Blood lead levels are highest in countries where lead is added to petrol or gasoline, where lead is used in paint or soldered products, in urban areas, in areas adjacent to high road traffic, and in developing countries.
text: Because of health concerns, lead is no longer added to gasoline and house paints.
text: However because lead was added to paint, varnish and gasoline for many years, the lead is still present in the underlying layers of paint and varnish and in the soil.
text: Today I found out why lead used to be added to gasoline.
text: For a more detailed explanation of why lead used to be added to gasoline, it’s necessary to understand a little bit more about gasoline and what properties make it a good combustion material in car engines.
text: Lead has also been added to gasoline to reduce engine knocking.