Lobbying is generally associated with groups. However,public relations can also provide lobbying services on behalf of an individual client. Lobbying is a professional attempt to bring about a change to a government policy,corporate policy,or public opinion that is favourable towards the organization, cause or group. During political campaigns,parties may engage public opinion. Lobbying can achieve positive outcomes for society. Legislation resulting in the production of cars with lower carbon emissions is the result of extensive lobbying. A 'from group' is a lobby group that hides its purpose.