Problem: Earth Crisis is an American metalcore band from Syracuse, New York, active from 1989 until 2001, reuniting in 2007. Since 1993 the band's longest serving members are vocalist Karl Buechner, guitarist Scott Crouse, bassist Ian Edwards and drummer Dennis Merrick. Their third guitarist Erick Edwards joined the band in 1998. The band has released eight studio albums, three compilations, two live albums and six music videos.

Earth Crisis had a huge impact on both the hardcore punk music and its ideals. MetalSucks said: "For anybody who was not in the hardcore scene back then, it is hard to describe the impact they had or how controversial they were. You either loved them or hated them for bringing both metal and veganism into the hardcore scene". Sociologist Ross Haenfler stated in The Vinyl Factory that "Earth Crisis became the face of straight edge throughout the 1990s" through "the convergence of 'radical' animal rights activism, a more aggressive 'metalcore' sound, and hardcore crews", becoming "one of the most controversial bands in the scene's history."  Their albums Firestorm, Destroy the Machines and Gomorrah's Season Ends were particularly influential for the emerging metalcore genre. According to Andrew O'Neill, "Earth Crisis inspired a much more heavy metal sound in hardcore" and "the distinction between the two [genres] started to crumble" shortly after those records were released.  To a large extent, Earth Crisis was responsible for the rising of vegan straight edge militancy in the mid- to late 90s, when veganism was rarely present in mainstream culture. Haenfler said that, while "earlier straight edge bands advocated vegetarianism - for example Youth of Today, Insted and Manliftingbanner", Earth Crisis "made animal rights (and environmentalism) central to the scene" as a "self-described 'vegan straight edge' band", "inspiring thousands of kids to give up animal products entirely." They also spawned many activists in the scene because their message "imparted the sense of urgency in a way that nothing else that ever come before had", according to Peter Daniel Young.  Some of their songs went on to be considered by some as anthems, such as "Firestorm" for straight edge and "Ultramilitance" for eco-terrorists. They also drew major media attention, having been featured and interviewed by CNN, CBS and The New York Times, while lead singer Karl Buechner was invited to address the Congress about teens and substance abuse.

how did they influence hardcore punk music

Answer with quotes: O'Neill, "Earth Crisis inspired a much more heavy metal sound in hardcore"

Background: Steve-O was born in the Wimbledon, London. His mother, Donna Gay (nee Wauthier), was Canadian, and his father, Richard Glover, was American. His paternal grandfather was English and his maternal step-grandfather was voice-over announcer Wayne Howell. His family was based in Brazil for many years due to his father's presidency of the South American division of Pepsi-Cola.
Context: On February 23, 2008 Steve-O joined the rest of the Jackass crew for the Jackass MTV 24 Hour Takeover, which promoted JackassWorld.com. He participated in several stunts, and even debuted his rap music video which was executive produced by recording artist D-Jukes, leading to Mike Judge bringing back the duo of Beavis and Butt-head for the first time in years to criticize it. Later, during the live broadcast Steve-O was kicked out of MTV studios on the request of executives for his behavior and intoxication.  On March 9, 2008, after receiving an e-mail from Steve-O that suggested his possible suicide, Steve-O's friends, including co-star Johnny Knoxville, became concerned he was a danger to himself and consulted with physician Dr. Drew Pinsky, who told them to get Steve-O to a hospital immediately. Steve-O was placed on a 72-hour psychiatric hold which was later lengthened to 14 days due to an alleged suicide attempt. In a mass e-mail addressed to his friends, Steve-O expressed that he previously had thought of his drug use and bipolarity as a "good thing", but that he now realizes that his drug use was apparently hurting those he loved most.  On June 4, 2008, Steve-O pleaded guilty to felony possession of cocaine. He avoided jail by the successful completion of his treatment program. In July, after 115 days of sobriety, Steve-O announced he was "back in the loony bin". He returned to the mental institution, he said, because "I've had horrible mood swings and severe depression. My brain is fucked up from using so much cocaine, ketamine, PCP, nitrous oxide, and all sorts of other drugs."
Question: did he try to commit suicide
Answer: to an alleged suicide attempt.

Question:
Funeral for a Friend were a Welsh post-hardcore band from Bridgend, formed in 2001. The band consisted of lead vocalist Matthew Davies-Kreye and guitarist Kris Coombs-Roberts for its entire history, with Darran Smith (guitar), Gareth Davies (bass) and Ryan Richards (drums and screaming vocals) completing the line-up for the band's first four studio albums. Between 2008 and 2012 the band transitioned towards its final line-up, which saw Davies-Kreye and Coombs-Roberts alongside guitarist and occasional vocalist Gavin Burrough, bassist Richard Boucher and drummer Pat Lundy (who left the band in 2014). Funeral for a Friend's popularity rose in the United Kingdom with the release of their debut album, Casually Dressed & Deep in Conversation (2003).
When Michael Davies, one of January Thirst's original vocalists, quit in December 2001, Matthew Evans (vocals) and Johnny Phillips (drums) invited Matt Davies (later Davies-Kreye) to try out for the vacated singer position. Soon afterward, the band reformed as Funeral for a Friend; the name is derived from a song by Planes Mistaken for Stars, one of Davies' favourite bands at the time.  During the start of the New Year they parted ways with second guitarist Kerry Roberts (Kris Coombs-Roberts's brother) and found a suitable replacement in Darran Smith (ex-Tripcage). The band recorded four tracks at Mighty Atom Studios for a proposed self-financed EP with another Welsh band From This Moment On. Upon hearing the tracks, Mighty Atom Records approached the band and offered a two-album deal, resulting in their debut EP, Between Order and Model (2002). Before the EP's release, Andi Morris (bass) quit, with Phillips and Evans also leaving. The band then recruited Gareth Davies (later Ellis-Davies) on bass and Ryan Richards on drums. Matt Davies became the band's only primary vocalist, with Gareth Davies performing backing melodies and Richards taking over Evans' screaming role.  In 2003, Funeral for a Friend recorded their second EP, Four Ways to Scream Your Name, produced and mixed by Colin Richardson. In mid-2003, the band secured their first Kerrang! award, winning the award for "Best UK Newcomer", beating The Darkness, who won in all other nominated categories. Funeral for a Friend's win was largely attributed to their fervent fan base, as the awards winner was decided by public vote online at the official Kerrang! Web site. In August 2003, Funeral for a Friend opened the Concrete Jungle stage at the Reading and Leeds Festivals.
Answer this question using a quote from the text above:

what was their most popular song during this period?

Answer:
their second EP, Four Ways to Scream Your Name,