<P> The main barriers to constructing such a tunnel are cost with estimates of between $88 billion to $175 billion as well as the limits of current materials science . Existing major tunnels , such as the Channel Tunnel , Seikan Tunnel and the Gotthard Base Tunnel , despite using less expensive technology than any yet proposed for the transatlantic tunnel , struggle financially . </P>
<P> The main barriers to constructing such a tunnel are cost with estimates of between $88 billion to $175 billion as well as the limits of current materials science . Existing major tunnels , such as the Channel Tunnel , Seikan Tunnel and the Gotthard Base Tunnel , despite using less expensive technology than any yet proposed for the transatlantic tunnel , struggle financially . </P>
why is n 't there a bridge between england and france
why is n 't there a bridge between england and france
cost limits of current materials science
cost limits of current materials science